Gas-engine speed-controller.



R. S. ANDERSON.

GAS ENGINE SPEED CONTROLLER. APPLICATION FILED JULY 30, 1914.

1,1 30,563, Patented Mar. 2, 1915;

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RICHARD SIMPSON ANDERSON, OF COBAN, GUATEMALA.

GAS-ENGINE SPEED-CONTROLLER.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed July 30, 1914. Serial No. 854,110.

To all whom it may concern Be it known that I, RICHARD S. ANDER- SON, a citizen of the United States, and a resident of Coban, Guatemala, Central America, have invented a new and Improved Gas- Engine Speed-Controller, of which the following isa full, clear, and exact description.

This invention relates to internal combustion engines and more particularly to reguwhich an air inlet. valve is provided for admitting air to the crank case, and in which the air compressed in the crank case is bypassed to the explosion chamber and while in transit thereto liquid fuel is injected so as to produce the explosive mixture, the regulator being so designed as to control thedegree of opening of the inlet valve to thereby regulate the amount of fuel mixture supplied to the explosion chamber.

More specifically the invention has for its object to provide a spring regulator for the air inlet valve, and means for easily, quickly and accurately varying the tension of the spring to suit the load conditions of the engine.

With such objects in view, and others which will appear as the description proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawing which illustrates one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views, Figure 1 is a side view of an engine with the inlet valve regulator applied thereto; Fig. 2 is a plan view of the regulator attachment; Fig. 3 is an enlarged side view of the adjusting means for varying the tenslon of the spring of the regulator; and Fig. 1 is a detail sectional viewon the line 44, Fig. 3.

Referring to the drawing, A designates an ordinary two-cycle explosive engine, and B is the manually controlled speed regulator therefor, which regulator is in the natureof an attachment which can be readily applied to engines already in use without any material change in the design thereof. The;

crank case 1 of the engine has an inlet valve casing 2 in which is a valve 8 that opens when a vacuum is produced in the crank case by the in or up stroke of the engine piston and which closes during the out or down stroke of the piston. The air compressed in the crank case is discharged through a bypass 4cto the cylinder 5 when the piston thereof uncovers the exhaust port, as is com mon in two-cycle engines, and in this by-pass is a needle valve 6 that controls the supply of fuel from a fuel feeding chamber 7 The regulation of speed depends upon the con trol of the extent of opening of the air valve 3, and for this purpose the regulator 13 U is designed.

The regulator B comprises a helical eX- tension' sprlng 8 which has its lower end formed into a hook to engage in an opening 10 in the upper end of the stem 11 of the valve 3, and the opposite end of the spring is formed into a hook 12 adapted to engage in any one of a number of spaced apertures 13 in a rod 14 that extends downwardly into the spring. at 15 to a controlling lever 16 which is fulcrumed at 17 on a sector plate 18, which plate is rigidly fastened to a bracket 19 mounted on some suitable part of the engine,

as, for instance, the cooling water pipe20;

This bracket is formed with a clip 21 or equivalent means which embraces the pipe 20 and rigidly clamps the bracket in place. On the plate 18 are teeth 22 with which is adapted to engage a pawl or catch 23 mounted by a pivot 24 on the lever 16, the lever and catch having handles 01 grips 25 and 26, respectively, and a spring 27 held by the pivot 24 operates between the handles 25 and 26 to hold the pawl or catch in engagement with theteeth 22. On the outer extremity of the bracket 19 is a stop 28 which limits the throw of the lever 16 in a direction to place the maximum tension on the spring 8, as when the engine is running light.

This rod is pivotally connected This stop 28 is adjustable for obtaining the proper adjustment of the regulator, and, as shown in Fig. 4, it is in the form of a wire or the like and passes through an eye 29 of a bolt 30, which bolt extends through the bracket 19 and has a wing nut 31 for clamping the stop 28 in any desired position.

When the engine is running light the regulating'mechanism will occupy the position shown in Fig. 1, -which means that the spring is under maximum tension, so that the valve 3 will open to its smallest extent and thereby admit a reduced volume of air to'the crank case, and as a consequence there will be a reduced supply of explosive mixture to the engine cylinder. When the load is increased, the handle 25 of the lever 16 will be raised so as to cause the rod 14: to move downwardly and thereby lessen the tension of the spring 8, which in turn permitsthe valve 3 to open to a greater extent.

When the load is thrown off the engine the lever 16will'be restored to former position in contact with the stop 28. Under maximum load conditions the lever 16 will be thrown upwardly to its full extent, as shown by dotted lines in Fig. 1, so that the tension of the spring 8 will be reduced to a minimum.

In actual practice a regulator applied in the manner shown and described efiects a great economy of fuel and enables a wider range of regulation, and furthermore permitsof easyand quick adjustment while the engine is running.

From the foregoing description taken in connection with the accompanying drawing, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention'appertains, and while I have described the-apparatus which I now consider to be the best embodiment thereof, I desire to have it understood that the apparatus shown is merely illustrative and that such changes may be made when desired as are within the scope of the appended claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. An engine including a cylinder, a crank case in which air is compressed, means through which the air passes from the crank nected for varying the tension of the said means, and a device for holding the controller element in different positions of adjustment.

2. An engine including an automatic inlet valve, with a regulator attachment therefor, said attachment comprising a bracket rigidly secured to the engine, a lever carried by the bracket, a member hingedly connected with the lever, a spring device adjustably connected with the member and connected with the valve, means for holding the lever in different positions of adjustment, and an adjustable stop on the bracket for engagement by the lever when the latter is in position to hold the device under maximum tension. I

8. The combination of an engine including aninlet valve, a helical extension spring connected therewith, a lever connected with the spring for adjusting the tension thereof, a catch on the lever, a toothed sector with which the catch engages to hold the lever in diflerent positions of adjustment, and an adjustable stop with which the lever engages when it is in the position of maximum tension of the spring.

4;. An engine including an automatic air inlet valve and a regulator attachment for controlling the operation of said automatic air inlet valve, said regulator attachment comprising a helical extension spring connected with the valve, a lever connected with the spring for adjusting the tension thereof,

'means for holding the lever in different positions of adjustment, and an adjustable stop member for limiting the movement of I the lever.

5. An engine including an automatic air inlet valve and a regulator-attachment for controlling the operation of said automatic air inlet valve, said regulator attachment comprising a helical extension spring connected with the valve, a lever connected with the spring foradjusting the tension thereof,

means for holding the lever in different positions of adjustment, an adjustable stop member for limiting the movement of the lever, said adjustable stop member comprising a slidable bar having a laterally bent end arranged to extend in the path of the lever, and means for securing said bar in adjusted positions.

In testimony whereof have signed my name to this specification in the presence of two subscribing witnesses.

RICHARD SIMPSON ANDERSON.

Witnesses:

J. WADE ANDnRsoN, CFH. BABE.

Copies-of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. E. 

